Until you can personally sign a non-proliferation agreement and then order processed uranium, nuclear power has not been “democratized” in the sense being talked about here.
https://nuclear.gepower.com/fuel-a-plant
my main point, though, is that nuclear energy is a fairly strange, highly-regulated-at-all-levels beast with its own long complicated history so it's not a particularly straightforward parallel to a hypothetical weapon-of-mass-destruction-enabling genetic engineering